Heucherella plant named &#39;autumn cascade&#39;

ABSTRACT

A new and distinct  Heucherella  plant substantially as shown and described, characterized by red to yellow green to rust colored leaves with a dark pattern along veins and a white veil, deeply lobed leaves with wide sinus, a low, dense, vigorously trailing habit with good branching, and excellent vigor.

BOTANICAL DENOMINATION

Heucherella hybrid

VARIETY DESIGNATION

‘Autumn Cascade’

CROSS REFERENCE TO SIBLINGS

Heucherella ‘Gold Cascade’ (U.S. Plant patent application Ser. No.13/987,664), Heucherella ‘Copper Cascade’ (U.S. Plant patent applicationSer. No. 13/987,660)

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar ofHeucherella and given the cultivar name of ‘Autumn Cascade’. Heucherellais in the family Saxifragaceae. Heucherella ‘Autumn Cascade’ originatedfrom a controlled cross between Heuchera ‘K521-1-1’ (a proprietary,unpatented, unreleased Heuchera), as the seed parent, and Tiarella‘42-2’ (a proprietary, unpatented, unreleased Tiarella), as the pollenparent.

Compared to the seed parent Heuchera ‘K521-1-1’, the new cultivar istrailing with rust colored, deeply lobed leaves with red to browncenters rather than clumping with pink to khaki colored, shallowly lobedleaves.

Compared to the pollen parent Tiarella ‘42-2’, the new cultivar has rustcolored leaves rather than green.

Compared to its sibling, Heucherella ‘Gold Cascade’, the new cultivarhas rust colored foliage that is deeply lobed rather than chartreuse andshallowly lobed.

Compared to its sibling, Heucherella ‘Copper Cascade’, the new cultivarhas rust colored foliage that is deeply lobed rather than red to rustand shallowly lobed.

Compared to Heucherella ‘Redstone Falls’, U.S. Plant Pat. No. 22,394,the new cultivar has a lower, denser habit and leaves with moreprominent lobing due to wider sinus on between the lobes and deepersecondary lobes.

This new Heucherella is uniquely characterized by:

1. red to yellow green to rust colored leaves with a dark pattern alongveins and a white veil,

2. deeply lobed leaves with wide sinus,

3. a low, dense, vigorously trailing habit with good branching, and

4. excellent vigor.

This new cultivar has been reproduced only by asexual propagation(cuttings and tissue culture). Each of the progeny exhibits identicalcharacteristics to the original plant. Asexual propagation by divisionand tissue culture using standard micropropagation techniques withterminal and lateral shoots, as done in Canby, Oreg., shows that theforegoing characteristics and distinctions come true to form and areestablished and transmitted through succeeding propagations. The presentinvention has not been evaluated under all possible environmentalconditions. The phenotype may vary with variations in environmentwithout a change in the genotype of the plant.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a seven-month-old Heucherella ‘Autumn Cascade’ in a onegallon container grown outside in shade in early July in Canby, Oreg.

FIG. 2 shows an eight-month-old plant in the trial field grown in partshade in late July in Canby, Oreg.

FIG. 3 shows a ten-month-old plant in a one gallon container grownoutside in shade in mid-October in Canby, Oreg.

DETAILED PLANT DESCRIPTION

The following is a detailed description of the new Heucherella cultivarbased on observations of 10-month-old specimens grown outside in a onegallon containers in shade October in Canby, Oreg. Canby is Zone 8 onthe USDA Hardiness map. Temperatures range from a high of 95 degrees F.in August to an average of 32 degrees F. in January. Normal rainfall inCanby is 42.8 inches per year. The color descriptions are all based onThe Royal Horticultural Society Colour Chart, 5^(th) edition, 2007.

-   Plant:    -   -   Form.—basal rosette with trailing stems, herbaceous            perennial.        -   Hardiness.—USDA Zone 4 to 9.        -   Size.—15 cm tall from top of the foliage to the ground and            40 cm wide before trailing down.        -   Habit.—mounding with 12 crowns and trailing with 7 stems.        -   Vigor.—excellent.        -   Roots.—fibrous, freely branching, fine, and White 155A in            color.-   Stem:    -   -   Size.—4.5 mm wide and grows to 70 cm long.        -   Internode length.—1 cm to 4 cm.        -   Surface texture.—glandular hairs.        -   Stem color.—Greyed Purple 187B.-   Leaf:    -   -   Type.—simple.        -   Arrangement.—rosette and alternate.        -   Shape.—broadly ovate.        -   Lobing/division.—7 palmate lobes with broad sinuses and            shallower secondary lobes.        -   Venation.—palmate.        -   Margins.—broadly crenate and slightly undulate.        -   Apex.—mucronulate.        -   Base.—cordate, sometimes overlapping.        -   Blade size.—basal and stem both grow to 10.5 cm long and 10            cm wide.        -   Surface texture.—glandular hairs on both surfaces.        -   Petiole description.—on basal leaf grows to 16 cm long and            2.5 mm wide, on stem grows to 11 cm long and 3 mm wide, both            with glandular hairs and Greyed Orange 177A.        -   Leaf color.—variable depending on age, light, and            temperature; spring topside Greyed Red 178B with a thin            white veil NN155B and dark splatter pattern near veins            Greyed Purple 187A, bottom side between Red Purple 59A and            bottom side Greyed Purple 187B; summer young leaves topside            Greyed Red 178B with a thin white veil NN155B and dark            splatter pattern near veins Greyed Purple 187A, summer older            leaves topside between Greyed Orange 166D and Greyed Yellow            161A with a thin white veil NN155B and the dark splatter            pattern Greyed Purple 187B, bottom side Greyed Purple 183D;            fall young leaves Greyed Red 178B to 177A with a thin white            veil NN155B and dark splatter pattern near veins Greyed            Purple 187A maturing to Yellow Green 146A with pattern 187A,            bottom side 187B; winter leaves topside Greyed Red 182B with            leaf edge 183A and pattern prominent 187A, bottom side 182A.-   Inflorescence:    -   -   Size.—usually 13.5 cm long and 4 mm wide.        -   Type.—upright to semi-upright raceme.        -   Number of flowers per raceme.—about 85.        -   Number of racemes.—about 25.        -   Peduncle.—grows to 30 cm long, 2.5 mm wide at base, 1 to 2            petiolate floral leaves (blades grow to 3.2 cm long and 4 cm            wide, ovate, 3 to 5 lobed, tip mucronulate, margin crenate,            base truncate to attenuate, glandular hairs on both sides,            Greyed Red 178A with a thin white veil NN155B, sometimes            splatter patterned 187A), glandular hairs, Greyed Purple            187B.        -   Pedicel.—grows to 4 mm long, with glandular hairs, Greyed            Purple 183A.        -   Bloom period.—July to October in Canby, Oreg.-   Flower bud:    -   -   Size.—2.5 mm long and 2 mm wide.        -   Description.—glandular puberulent, ovoid, side-facing.        -   Color.—White 155A.-   Flower:    -   -   Type.—imperfect.        -   Shape.—campanulate.        -   Attitude.—usually side-facing.        -   Size.—4 mm deep and 7 mm wide.        -   Petal description.—5 in number, stellate, linear to            spatulate, 3 mm long and 0.5 mm wide, reflexed slightly, tip            acuminate, base attenuate, margin entire, glabrous and White            NN155B on both sides.        -   Calyx description.—3 mm deep and 4 mm wide, campanulate,            with 5 lobes, divided ½ way to the base, lobes 2 mm long and            1.5 mm wide, oblong, glandular hairs on back sides, glabrous            inside, tip obtuse, margin entire, White NN155B on both            sides.        -   Stamen description.—10, 3 mm long, filament 3 mm long and            White NN155B, anthers Greyed Orange 177A, no pollen.        -   Pistil description.—1 in number, grows to 4.5 mm long and            1.5 mm wide, ovaries grow to 1.5 mm long and 1.5 wide, White            NN155B, beaked style 3 mm long White NN155B.        -   Fragrance.—none.        -   Lastingness.—each raceme blooms for about 2 weeks on the            plant.-   Fruit and seed: none-   Disease and pest tolerance: The new cultivar is typical to the    genus. No known resistances to pests or diseases. No problems have    been found in Canby, Oreg.

I claim:
 1. A new and distinct Heucherella plant as herein illustratedand described.